To such content yourself:
If we stretch: Onota as an invented fusion of ono (axe) + ta (field) → "axe-field" – a surreal battleground. More likely: It’s intended as – negating a category. Or possibly a corrupted Spanish/Japanese hybrid: "oh, not a" .
If you arrived here searching for "shounen ga onota espanol 3d hot," try these corrected search strings to find actual media: